Former two-time Mr. Olympia Franco Columbu tragically and unexpectedly passed away on August 30 while swimming at a beach in San Teodoro in his native Sardinia, the Italian newspaper La Nuova reports. He was 78.

Columbu was a renowned bodybuilder known for his remarkable feats of strength—including a 750-pound deadlift and a 400-pound clean and jerk—and for being the best friend and training partner to Arnold Schwarzenegger. Together, the pair trained for numerous Mr. Olympia competitions, two of which Columbu won in 1976 and 1981. He also had a successful movie career with roles in The Terminator and Conan the Barbarian. Later in his life, Columbu became a licensed chiropractor and settled down with his wife, Deborah.

In honor of Columbu’s memory and the enduring legacy that he leaves behind, we’ve compiled posts from the bodybuilding and fitness community that highlight his impact.

Arnold Schwarzenegger

You’ve heard me say that I don’t like when people call me a self-made man. You’ve even heard me say that you’re part of the reason I could never accept that label.

But I wanted you to know why. From the minute we met in Munich, you were my partner in crime. We pushed each other, we competed with each other, and we laughed at every moment along the way.

When I finally got to America, I was alone. I’d left my family, my country, my whole life behind. So when I asked Joe Weider to bring you to train with me, it was because I knew I wasn’t the same without my best friend. I could thrive without money, without my parents, but I couldn’t thrive without you.

I am devastated today. But I am also so, so grateful for the 54 years of friendship and joy we shared. The pumps, the chess games, the construction work, the meals, the pranks, the life lessons – we did it all together. We grew and we learned and we loved. My life was more fun, more colorful, and more complete because of you.

I will always miss you. But I’ll also know that a part of you lives on in me, in Debbie, in Maria, and in the millions of people you inspired every day you lived. And I will be there for Maria and Debbie, so you can rest now with no worries.

I love you Franco. I will always remember the joy you brought to my life, the advices [sic] you gave me, and the twinkle in your eye that never disappeared. You were my best friend.

Sylvester Stallone

FRANCO COLUMBU, The great and strongest bodybuilder I have ever met has past [sic]… He taught me many things that I have applied throughout my life – We will NEVER A MAN LIKE THIS AGAIN – thank you for the memories Franco

Phil Heath

I did not want to believe the sad news about Franco’s passing today. He was so strong, so driven, so humble and if you got a chance to meet him he was so damn funny!!!! It was just this past March we were all chatting it up on stage at Arnold’s Sunday Seminar and the stories you shared were awesome and absolutely hilarious. Thank you for always motivating us through your actions of strength, honor and kindness. You were a healer also being a Doctor of Chiropractic as you helped so many people with their ailments which I had found most impressive aside from the heavy lifts you would perform. Your ability to achieve bodybuilding’s highest honors, yet compete as a strongman carrying a refrigerator on your back to get injured but show no fear of getting back up, get checked out and literally do an interview with CBS exemplified your Demi-God greatness!!! You will be terribly missed and never forgotten. I am in complete shock! May you Rest in Supreme Power and thank you again for your incredible impact on the world! My most sincere condolences. #FrancoColumbu #MrOlympia #Legend #Strongman #DrOfChiropractic #RIP #RestInPower

Dexter Jackson

R.I.P to our 2x Mr Olympia winner Franco Columbu! It was an honor knowing you the short time I did. May God bless you and your family. See you in the next life my friend! ❤️ #dex #dexter #dexterjackson #dexterjacksonclassic #dexterjacksonproductions #mro #mrolympia #mrolympia08 #blade #built #builtbyblade

Steve Kuclo

I’m sure that any bodybuilder would agree that Franco was a true inspiration, legend of the sport, and will always be one of the greatest of all time. Watching him and Arnold train in Pumping Iron countless times was extremely influential in forming me into the bodybuilder I am today… RIP??

Arash Rahbar

Sad day for bodybuilding as we say good bye to the great former Mr. Olympia Franco Columbu. (@francocolumbu) Franco was considered to be One of Arnolds [sic] closest friends and won The Olympia the year after Arnold retired.

Frank was not only an incredible bodybuilder and freakishly strong powerlifter but his demeanor and happy go lucky personality stood out to me the most. He was doing what he truly loved and it showed!

You will be missed and we will remember you forever, rest in peace Franko [sic]

Brian Shaw

Sad to hear the news of @francocolumbu passing away today. This man was a pioneer and helped pave the way for many men that have followed him. I had the honor of meeting him and he will be missed by so many of the people he inspired!

Sending my best to all his family, loved ones and his good friend @schwarzenegger